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• W1505581724 abstract "We investigate the presence of squeezing in the weakly repulsive uniform Bose gas, in both the condensate mode and in the nonzero opposite-momenta mode pairs, using two different variational formulations. We explore the U(1) symmetry breaking and Goldstone's theorem in the context of a squeezed coherent variational wavefunction, and present the associated Ward identity. We show that squeezing of the condensate mode is absent at the mean field Hartree-Fock-Bogoliubov level and emerges as a result of fluctuations about mean field as a finite volume effect, which vanishes in the thermodynamic limit. On the other hand, the squeezing of the excitations about the condensate survives the thermodynamic limit and is interpreted in terms of density-phase variables using a number-conserving formulation of the interacting Bose gas." @default.
• W1505581724 created "2016-06-24" @default.
• W1505581724 creator A5013054308 @default.
• W1505581724 creator A5044690810 @default.
• W1505581724 date "2006-10-30" @default.
• W1505581724 modified "2023-09-26" @default.
• W1505581724 title "Squeezing in the weakly interacting uniform Bose-Einstein condensate" @default.
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• W1505581724 doi "https://doi.org/10.1103/physreva.74.043622" @default.
• W1505581724 hasPublicationYear "2006" @default.
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